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Slach merged 2 commits into from
May 7, 2026
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Update add_remove_replica.md #183

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Update add_remove_replica.md
DougTidwell May 7, 2026
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Update add_remove_replica.md
DougTidwell May 7, 2026
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30 changes: 10 additions & 20 deletions ...inity-kb-setup-and-maintenance/altinity-kb-data-migration/add_remove_replica.md
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Expand Up @@ -18,29 +18,21 @@ To add some ClickHouse® replicas to an existing cluster if -30TB then better to

[Core Settings | ClickHouse Docs](https://clickhouse.com/docs/en/operations/settings/settings/#max_replicated_fetches_network_bandwidth_for_server)

💡 Do the **Gbps to Bps** math correctly. For 10G —> 1250MB/s —> 1250000000 B/s and change `max_replicated_*` settings accordingly:
💡 Do the **Gbps to Bps** math correctly. For 10G —> 1250MB/s —> 1250000000 B/s and change the `max_replicated_*` settings accordingly (_changing these settings restarts the server_):

- Nodes replicating from:

```xml
<clickhouse>
<profiles>
<default>
<max_replicated_sends_network_bandwidth_for_server>50000</max_replicated_sends_network_bandwidth_for_server>
</default>
</profiles>
<max_replicated_sends_network_bandwidth_for_server>50000</max_replicated_sends_network_bandwidth_for_server>
</clickhouse>
```

- Nodes replicating to:

```xml
<clickhouse>
<profiles>
<default>
<max_replicated_fetches_network_bandwidth_for_server>50000</max_replicated_fetches_network_bandwidth_for_server>
</default>
</profiles>
<max_replicated_fetches_network_bandwidth_for_server>50000</max_replicated_fetches_network_bandwidth_for_server>
</clickhouse>
```

Expand Down Expand Up @@ -185,17 +177,15 @@ FORMAT TSVRaw;
- increase moves from 8 to 16

```xml
<yandex>
<profiles>
<default>
<max_replicated_fetches_network_bandwidth_for_server>625000000</max_replicated_fetches_network_bandwidth_for_server>
<background_fetches_pool_size>4</background_fetches_pool_size>
<background_move_pool_size>16</background_move_pool_size>
</default>
</profiles>
</yandex>
<clickhouse>
<max_replicated_fetches_network_bandwidth_for_server>625000000</max_replicated_fetches_network_bandwidth_for_server>
<background_fetches_pool_size>4</background_fetches_pool_size>
<background_move_pool_size>16</background_move_pool_size>
</clickhouse>
```

*Changing these settings restarts the server.*

- Also to monitor this with:

```sql
Expand Down
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